linux/net
Andrea Mayer 20a081b798 seg6: add VRF support for SRv6 End.DT6 behavior
SRv6 End.DT6 is defined in the SRv6 Network Programming [1].

The Linux kernel already offers an implementation of the SRv6
End.DT6 behavior which permits IPv6 L3 VPNs over SRv6 networks. This
implementation is not particularly suitable in contexts where we need to
deploy IPv6 L3 VPNs among different tenants which share the same network
address schemes. The underlying problem lies in the fact that the
current version of DT6 (called legacy DT6 from now on) needs a complex
configuration to be applied on routers which requires ad-hoc routes and
routing policy rules to ensure the correct isolation of tenants.

Consequently, a new implementation of DT6 has been introduced with the
aim of simplifying the construction of IPv6 L3 VPN services in the
multi-tenant environment using SRv6 networks. To accomplish this task,
we reused the same VRF infrastructure and SRv6 core components already
exploited for implementing the SRv6 End.DT4 behavior.

Currently the two End.DT6 implementations coexist seamlessly and can be
used depending on the context and the user preferences. So, in order to
support both versions of DT6 a new attribute (vrftable) has been
introduced which allows us to differentiate the implementation of the
behavior to be used.

A SRv6 End.DT6 legacy behavior is still instantiated using a command
like the following one:

 $ ip -6 route add 2001:db8::1 encap seg6local action End.DT6 table 100 dev eth0

While to instantiate the SRv6 End.DT6 in VRF mode, the command is still
pretty straight forward:

 $ ip -6 route add 2001:db8::1 encap seg6local action End.DT6 vrftable 100 dev eth0.

Obviously as in the case of SRv6 End.DT4, the VRF strict_mode parameter
must be set (net.vrf.strict_mode=1) and the VRF associated with table
100 must exist.

Please note that the instances of SRv6 End.DT6 legacy and End.DT6 VRF
mode can coexist in the same system/configuration without problems.

[1] https://tools.ietf.org/html/draft-ietf-spring-srv6-network-programming

Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-04 13:30:51 -08:00
..
6lowpan
9p net: 9p: Fix kerneldoc warnings of missing parameters etc 2020-11-02 12:25:52 -08:00
802
8021q net: vlan: Fixed signedness in vlan_group_prealloc_vid() 2020-09-28 00:51:39 -07:00
appletalk net: appletalk: fix kerneldoc warnings 2020-10-30 11:48:17 -07:00
atm atm: nicstar: Replace in_interrupt() usage 2020-11-18 16:43:55 -08:00
ax25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-07-25 17:49:04 -07:00
batman-adv batman-adv: Don't always reallocate the fragmentation skb head 2020-11-27 08:02:55 +01:00
bluetooth Bluetooth: Replace zero-length array with flexible-array member 2020-10-29 17:22:59 -05:00
bpf bpf: fix raw_tp test run in preempt kernel 2020-09-30 08:34:08 -07:00
bpfilter Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH" 2020-10-15 12:33:24 -07:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-03 15:44:09 -08:00
caif caif: Remove duplicate macro SRVL_CTRL_PKT_SIZE 2020-09-05 15:57:05 -07:00
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-27 18:25:27 -08:00
ceph libceph: clear con->out_msg on Policy::stateful_server faults 2020-10-12 15:29:27 +02:00
core Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2020-12-04 07:48:12 -08:00
dcb net: dcb: Fix kerneldoc warnings 2020-10-30 11:59:54 -07:00
dccp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-27 18:25:27 -08:00
decnet treewide: rename nla_strlcpy to nla_strscpy. 2020-11-16 08:08:54 -08:00
dns_resolver
dsa net: dsa: tag_hellcreek: Cleanup includes 2020-11-23 16:57:21 -08:00
ethernet net: datagram: fix some kernel-doc markups 2020-11-17 14:15:03 -08:00
ethtool Merge https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-12 16:54:48 -08:00
hsr genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
ieee802154 treewide: rename nla_strlcpy to nla_strscpy. 2020-11-16 08:08:54 -08:00
ife
ipv4 Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2020-12-04 07:48:12 -08:00
ipv6 seg6: add VRF support for SRv6 End.DT6 behavior 2020-12-04 13:30:51 -08:00
iucv net/af_iucv: set correct sk_protocol for child sockets 2020-11-21 14:43:45 -08:00
kcm net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
l2tp genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
l3mdev net: l3mdev: Fix kerneldoc warning 2020-10-30 11:43:42 -07:00
lapb net/lapb: fix t1 timer handling for LAPB_STATE_0 2020-11-27 17:22:51 -08:00
llc net: llc: Fix kerneldoc warnings 2020-10-30 11:34:09 -07:00
mac80211 Merge https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-19 19:08:46 -08:00
mac802154 net: mac802154: convert tasklets to use new tasklet_setup() API 2020-11-07 10:40:56 -08:00
mpls mpls: drop skb's dst in mpls_forward() 2020-11-03 12:55:53 -08:00
mptcp mptcp: emit tcp reset when a join request fails 2020-12-03 12:56:03 -08:00
ncsi net/ncsi: Fix netlink registration 2020-11-12 17:00:13 -08:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-03 15:44:09 -08:00
netlabel Merge https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-19 19:08:46 -08:00
netlink netlink: export policy in extended ACK 2020-10-09 20:22:32 -07:00
netrom treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfc treewide: rename nla_strlcpy to nla_strscpy. 2020-11-16 08:08:54 -08:00
nsh
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-03 15:44:09 -08:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-27 18:25:27 -08:00
phonet treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
psample genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
qrtr wireless-drivers-next patches for v5.11 2020-12-04 10:56:37 -08:00
rds RDMA: Add rdma_connect_locked() 2020-10-28 09:14:49 -03:00
rfkill rfkill: Fix use-after-free in rfkill_resume() 2020-11-12 09:18:06 +01:00
rose rose: Fix Null pointer dereference in rose_send_frame() 2020-11-20 10:04:58 -08:00
rxrpc rxrpc: Ask the security class how much space to allow in a packet 2020-11-23 19:53:11 +00:00
sched Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-03 15:44:09 -08:00
sctp sctp: Fix some typo 2020-11-23 17:44:11 -08:00
smc net/smc: Add support for obtaining SMCR device list 2020-12-01 17:56:13 -08:00
strparser
sunrpc net: datagram: fix some kernel-doc markups 2020-11-17 14:15:03 -08:00
switchdev net: switchdev: Fixed kerneldoc warning 2020-09-23 17:46:31 -07:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-03 15:44:09 -08:00
tls net/tls: make sure tls offload sets salt_size 2020-12-01 17:51:30 -08:00
unix networking changes for the 5.10 merge window 2020-10-15 18:42:13 -07:00
vmw_vsock Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-27 18:25:27 -08:00
wireless Some updates: 2020-11-13 12:03:22 -08:00
x25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-03 15:44:09 -08:00
xdp Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2020-12-04 07:48:12 -08:00
xfrm net: xfrm: use core API for updating/providing stats 2020-11-14 17:01:08 -08:00
compat.c iov_iter: transparently handle compat iovecs in import_iovec 2020-10-03 00:02:13 -04:00
devres.c
Kconfig wimax: move out to staging 2020-10-29 19:27:45 +01:00
Makefile wimax: move out to staging 2020-10-29 19:27:45 +01:00
socket.c net: don't include ethtool.h from netdevice.h 2020-11-23 17:27:04 -08:00
sysctl_net.c